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Canon Speedlite Transmitter ST-E3-RT

Speedlite Flash

Speedlite Transmitter ST-E3-RT

    Canon Speedlite Transmitter ST-E3-RT

    A radio-frequency flash trigger aimed at professional photographers using off-camera flash.

    Fire compatible Speedlite flashguns over distances of up to 30m. Radio-frequency control provides reliable operation even when direct line of sight is not possible.

    • Radio frequency remote flash trigger
    • Fire selected Speedlites from 30m away
    • Part of the E-TTL II flash system
    • Controls up to 15 flashguns
    • Remote camera triggering
    • Weather sealed against dust and moisture.

    Reliable off-camera flash control

    Control compatible Canon Speedlite flashguns over distances up to 30m. 2.4GHz radio frequency triggering operates reliably, even when shooting outdoors and around corners – direct line of sight not required.

    Multiple flash photography

    Create intricate multi-flash lighting set ups, triggering up to 15 Speedlite flashes with a single camera-mounted Speedlite Transmitter ST-E3-RT. E-TTL II flash metering makes exposure control easy.

    Remote camera control

    Trigger an EOS camera fitted with a Speedlite Transmitter ST-E3-RT from a second unit or from a compatible Speedlite flashgun, such as the Speedlite 600EX-RT. Up to 15 cameras can be triggered at once, for synchronised shooting.

    Easy to use design

    The Speedlite Transmitter ST-E3-RT is sealed against dust and moisture to the same degree as professional EOS cameras and L-series lenses. It features an easy to read back-lit LCD control screen and is powered by two AA/LR6 batteries.

    Product Specification

    FLASH MODES

    Auto exposure control E-TTLII/E-TTL/TTL
    High speed sync (FP) Yes
    Manual / output settings Yes - 1/1-1/128
    Manual steps 1/3 step
    Strobe / output settings Yes - 1/4-1/128
    Frequency -500Hz

    FLASH-RELATED FUNCTION

    FE lock Yes
    Flash exposure compensation Yes
    Flash exposure bracketing Yes
    Second-curtain flash sync No
    Modelling flash Yes
    Colour temperature info communication No

    WIRELESS FLASH

    Transmitter Yes
    Transmission type Radio
    Transmitter Max range approx. Indoors: 30m
    Outdoors: 30m
    Slave No
    No. of groups 5
    No. of channels 15
    Remote Shutter Release Yes

    AF ASSIST

    AF-assist beam No

    POWER SOURCE

    Battery 2 x AA batteries
    External power supply No

    CONSTRUCTION

    Dust and water resistance Yes
    Mounting foot material Metal

    MISC.

    Custom function 8 (3 personal functions)
    PC terminal No
    Compatible accessories SPEEDLITE 600EX-RT
    Dedicated flash bracket No

    DIMENSIONS & WEIGHT

    Size (W x H x D), mm 67.4 x 61.5 x 77.4¹
    Weight (Excluding batteries), grams 110g
    Size (W x H x D), mm ¹ Except for the dust and water prevention adaptor
    • * Time taken to recharge flash after full discharge using Alkaline AA batteries.
    • ** With Compatible cameras only.

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